Malicious PDF — malware analysis report

Static analysis result for SHA-256 78c311047ffd6931…

MALICIOUS

PDF

95.8 KB Created: 2021-09-02 12:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1087ae9a722afb4d0312c26490502a16 SHA-1: 50a6df15ff2aeeb3dac81e789f965762d3f6b87a SHA-256: 78c311047ffd6931b3ea4c691f40bd68c377ca56afa56e509a0d318d04e3604a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://coretry.ru/uplcv?utm_term=hospital+waste+management+project+report+pdf PDF link annotation
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/3a78fda6559aeeedcd14ec1f77f4fa30/27260831742.pdfIn PDF document text
    • http://melinterior.ru/userfiles/files/27761921701.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/30668166721.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210601164521318.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/pipunajuvulawataguliroxu.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb53b4a079d---poregapu.pdfIn PDF document text
    • http://aristosaigonhotel.com/uploads/files/kajilefegunexonideb.pdfIn PDF document text
    • https://gikguamerica.com/userfiles/file/niraf.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/07/05/file/20210705_153451_187.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/jugonudekovuvava.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/kisom.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/sktnbjc4dfn9jdimvm7psqlr13/45582627752.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080247963d56---xitoxexemimoxuwavexukakop.pdfIn PDF document text
    • http://cunningham-reunion.com/clients/7/73/7399477c88ef979e1ad3ac38e42cffcc/File/19339612122.pdfIn PDF document text
    • https://mystruggle.uk/indigo/ckfinder/userfiles/files/6514435213.pdfIn PDF document text
    • https://inmaabiladi.com/userfiles/files/janazol.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c9406b706---zital.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/89354871571.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/161291eadacce4---98881555290.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3e63000f07---taxoburedidemikugedidu.pdfIn PDF document text
    • http://csc0731.com/userfiles/file/20210627125552_404b1x.pdfIn PDF document text
    • http://derma-dts.de/files/file/67322445076.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160997c0f6b3cb---53440163695.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/2bab188c2813f72399460b26ad31f100/31686525121.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11102 11172 bytes
SHA-256: a0d6c6c7bca61b8472098befe5a18509526c76ac40c6d82129fb7b7d918e90ef
font_01_sfnt_off00012ae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE5 18028 bytes
SHA-256: 8d04267901d20f00ee1ee3a18163e416f1a613c8083b3361b51f4e04e82aa06d
font_02_sfnt_off0001591e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1591E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.